The demand for increasingly scalable, capable, and inexpensive database, backup, and recovery solutions has never been higher than it is now, as digital transformation reaches its pinnacle. Restoring is the process of recovering data from a backup and applying logged transactions to the data. Backups are used to restore data. Restoring returns the backup file […]
2021-07-09
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Troubleshooting Performance Problems is not very easy process and can be complicated when it comes to identifying problems with JIRA application.
2021-06-30 (first published: 2021-05-27)
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By Chris Yates
I’m thrilled to be covering the Microsoft Keynote: Fuel AI Innovation with Azure Databases on Day...
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Comments posted to this topic are about the item What's New for the Microsoft...
Comments posted to this topic are about the item Using Outer Joins
I have this data in a SQL Server 2019 database:
Customer table CustomerID CustomerName 1 Steve 2 Andy 3 Brian 4 Allen 5 Devin 6 Sally OrderHeader table OrderID CustomerID OrderDate 1 1 2024-02-01 2 1 2024-03-01 3 3 2024-04-01 4 4 2024-05-01 6 4 2024-05-01 7 3 2024-06-07 8 2 2024-04-07I want a list of all customers and their order counts for a period of time, including zero orders. If I run this query, how many rows are returned?
SELECT c.CustomerName, COUNT(oh.OrderID) FROM dbo.Customer AS c LEFT JOIN dbo.OrderHeader AS oh ON oh.CustomerID = c.CustomerID WHERE oh.Orderdate > '2024/04/01' GROUP BY c.CustomerNameSee possible answers